From the introduction:
Welcome to the raggedy edge of human space! The Twilight Sector Campaign Setting choose your path adventure, “Into the Star,” awaits you! Twilight Sector products provide both the Player and Game Master a dynamic ongoing campaign setting and custom rules options for their Traveller role playing games. Designed to bring many of the modern science fiction elements to the best set of science fiction role playing rules yet devised, the Twilight Sector will immerse you into a setting swimming in unanswered questions crying out for intrepid scientists, adventurers and rogues to answer.
Your first step towards the grand adventure of the Twilight Sector Campaign is to use the Mutant Creation rules below along with the Traveller Core Rules to create a character. You could choose a Belt Mod SIM (Scientifically Induced Mutation) which would be appropriate for the choose your path adventure that follows the Mutant Creation section.
In case you want to skip the character creation process and dive right into the action, we have included a pre-generated Belt Mod Sim for you to play.